Engine.



No. 871,634- PATENTED NOV. 19, 1907.

J. ROTHGHILD.

ENGINE.

APPLICATION FILED JAN.31,190'I.

2 SHEETS-SHEET 1.

WITNESSES: INVENTOR Jim 32 1 03/; 622161 241 944% BY a ATTORNEY ETER"ca. wnsmuamu, o. c.

No. 871,634. PATBNTBD NOV. 19, 1907. J. ROTHCHILD.

ENGINE.

APPLICATION FILED JAN.31.1907- 2 SHEETSSHBET 2.

' WITNESSES. INVENTOR Jzuefig fif/ c z'id MQ/M BYZ4 c ATTORNEY n. c. runNORRIS PETERS co, wnsnmcron,

UNITED STATES PATENT ornrcn.

JOSEPH ROTHOHILD, OF BROOKLYN, NEW YORK, ASSIGNOR OF TWO-FIFTIIS TOROBERT BUCHANAN, OF BROOKLYN, NEW YORK, ONE-FIFTH TO ROBERT H. BURNS, OFQUEENS, NEW YORK, AND TWO-FIFTHS TO PIERRE P. PULLIS, OF BROOKLYN, NEWYORK.

ENGINE Specification of Letters Patent.

Patented Nov. 19, 1907.

To all whom it may concern:

Be it known that I, JOSEPH RoTr-IeHILD, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful- Improvements in Engines, of which the followingis a specification.

This invention relates to certain'features of construction set forth inthe following specification and claim and illustrated in the annexeddrawin in which:

Figure 1 is a longitudinal sectional elevation of anengine embodyingthis invention. Fig. 2 is a section along 00 a: Fig. 1. Fig. 3 is afront elevation of Fig. 1. Fig. 4 is a section along y y Fig. 1.

In this drawing are shown two shafts a to each of which are keyed camsor eccentrics b. The keys are shown at c and the spacers (Z between thecams keep the latter apart and also prevent the keys from coming out ofplace.

The Working pressure entering at g is caused to alternately press ormove the piston e. The slide valves h in connection with parts 'i and mare applied in suitable way. The valves are actuated by eccentrics 7cand shaft n rotated by sprocket wheel 0 and chain 19 receiving motionfrom a shaft a.

On the shaft n is a loose collar q with handle r and arm 8 carryingguide pulleys t. If the handle is moved for example as indicated byfull, and dotted lines in Fig. 3 the slack of the chain is shifted andthe shaft n rotated so far or the relation of shafts a and nsufficiently changed to reverse or shift the valves for the engine torun the other way.

The slide valves and their stems and eccentrics k as seen are containedin the steam chest an advantage of which is that the valve stem does nothave to be extended through any stuffing box nor does the constructionrequire the joint heretofore needed by the stem passing through astufling box and bearing. It may also be noted that an advantage of theconstruction is that the eccentrics lc when in the steam chest are selflubricating being supplied with oil entering in connection with thesteam.

As seen steam enters each cylinder at only one end or point so that in.the adjustment of each valve the setting is simplified as theadjustment of the valve need to be made with regard to only one end orpoint instead of two as heretofore.

The shaft n at the point where it enters the steam chest is providedwith a ring a seated against a flange on the shaft and having theopposite side or beveled face pressing or seated against a correspondinsurface on'a bushing or hearing o in a wall of the steam chest.

Each piston e is shown with an extended. or flanged base resting upontwo cams. As these cams rotate in opposite directions the piston or itsbase is given a rotating or swiveling motion as well as having areciproeating motion or a stroke toward the shafts and return.

The shafts a are shown connected by a uniting gear 2 engaging orconnecting the gears 3 or shafts a. By uniting the shafts the pistonsare maintained at the proper plane and the parts work in requiredsequence.

The assembling of the parts can be accomplished by keying one cam to itsplace on the shaft, slipping a spacer onto the shaft to such cam or key,then keying the next cam to its place on the shaft and so on.

The pistons are shown each with its cams equidistant from the axis ofsaid piston.

It may be noted that no cross head nor like slip ing connection isemployed but that eac piston acts directly upon or contacts directlywith its cam or with a revolving contact. Friction or slipping are thusreduced to a minimum.

The piston is rotated without its head or inner ends being in contactwith any part of the cylinder, but merely exposed to the pressure of theworking medium so that the piston rotates or swivels freely or withoutexcessive friction or practically without friction.

In engines where there is a crank movement the working pressure must bemomentary and must be accurately timed in order to be effectivelyutilized. In the above device however as explained a premature workingpressure will not retard the running of the parts.

Now what I claim is:

An engine having a piston and shafts located eccentrieally to the axisof the piston and having cams fixed thereto, said In testimony whereof Ihave hereunto set piston and cams being made to act or conmy hand in thepresence of two subscribing tact directly one upon the other to avoidWitnesses.

employment of any slipping or other fric- JOSEPH ROTHCHILD. 5 tionconnection and driving or uniting gears Witnesses:

connected to and made to directly actuate EDWARD WIEsNER,

each shaft. CHRISTIAN ALMsTEAD.

